Electric fan



A. LECTRIC FAN Filed Nov. 29, 1926 '2 Sheets-Sheet 2 5OCRAT$ A XIPPAS Patented Dec. 11, 1928.

UNITED STATES som'ms A. mus, or rrrrsnunen, rmmmvnm unc'rnic FAN.

' Application filed November 29, mt. Serial No. 151,427.

This invention relates to improvements in vertical fans of the general type shown and described'in Reissue Patent No. 71,453 and Patent No. .1,577,280.'

The main object of this invention is to alter the construction of the vertical fans shown'in the above patents whereby a more compact assembly is provided such as may be more su'itableto application to Walls and ceilings and for use in railway cars, coaches, Pullman cars, boats, and other public conveyances.

The foregoing is produced by arranging the blades all within one half of a sphere, the blades being in quadrant form and being pitched to secure the desired ventilating result, i. e., a two direction suction and a central annular discharge.

The present assembliesare enclosed as in prior structures in safety cages which eliminate the possibility'of injury to persons or to the fan elements.

Other features and objects will more clearly hereinafter appear by reference tothe accompanying specification and drawing, in the latter of which similar characters of reference designate corresponding parts throughout the several views, in which Figure 1 is aside elevation of one form of 80 the invention in position on a. wall or ceiling.

Figure 2 is a side elevation with the cage in section to show the fan blades.-

Figure 3 is a plan view of the fan with the cage shown diagrammatically.

Figure 4 is a perspective of the spider or fan blades carrier.

Figure 5 is a. side elevation showing'the assembly on a standard base.

Figure 6 is a side elevation of another form orted from, a wall or-ceiling.

lgure 7 is an elevation with the cage in section.

Figure 8 is a plan view of the blades and Figure 9 is a side elevation of the latter form on a standard base.

The base or stand of both forms of fans shown are substantially identical in form being designed mainly to enclose the motor and support the fan elements and cage. In Figures 1 and 6 the base or supports are shown extending into the wall or ceiling and in Figures 5 and 9 the form is standard for resting on an convenient stand. Reference character 1 indicates this base and 2 the spherical sebtion of the cage which may be completely enclosed as by end section 3. The section 3, or in fact the entire assembly may be of mesh in lieu of the perforated sheet metal arrangement shown.

The motor and motor mounting is substantially the same as in the prior patents, the motor shaft 5 extending into the cage to carry the fan assembly. In the fan illus trated in Figures lto 5 the shaft 5 extends to a. point close to the upper end of the cage It will be noted that all four flanges extend in the same direction, inwardly, so that when the blades 10 are attached thereto they will revolve in a hemisphere. The blades 10 are each arranged at. a pitch reverse to that of the one diametrically opposite and the pitch of the various blades may be changed as found necessary or desirable to produce the necessary or desired velocity.

Referringv nowpto Fi ure 1 attention is directed to the fact clear y illustrated in the drawings, that air enters the fan cage or casing at the polar 'zones and is discharged at the medial zone. A co-minglin'g of the air currents results from the foregoing producing advantageous ventilating qualities.

In that form of fan shown in Figures 6 to 9 inclusive of the drawings the arrangement of the cage and fan blades is practically the reverseto that of Figures 1 to 5. In this form the shaft 5 of the motor extends out of the casing 1 only a suflicient distance to permlt .the arrangement of the hub of the spider on fan carrying element. This element is identical in this form to that of the previous form and accordingly no additional description is necessary. It will be noted that the spider is arranged on the stub shaft with the flanges extending outwardly which is reverse to the arrangement in the form heretofore described. This arrangement of the spider produces a reverse arrangement of blades i. e., the curved peri heral edges of the blades are turnedoutthe perforated cage, it being obvious to one skilled in the art that such design may be altered to facilitate ventilation or application of the arrangement as ma be desired.

WhatI claim as new and esire to secure by Letters Patent is 1. In a device of the class described, a rotary impeller and an enclosing casing therefor, said casing having a medial zone and two polar zones of openings therein, said impeller including means whereby the air is drawn into saidcasing through the openingsin the polar zones, and forced toward the medial zone, said impeller means serving to discharge the air through the openings in the medial zone, and including a. rotatably mounted support, a series of horizontal arms carried by said support, and a plurality of blades attached to said arms and all extending in a direction to one side of said horizontal arms, the impeller being unbladed at the opposite side of said horizontal arm s.

2. 'In a device of the class described, a rotary impeller, and a hemispherical enclosing casing therefor, said casin having a medial zone and two polar zones 0% openings therein, said impeller includin means whereby the air is drawn into sai casing through the openings in the polar zones, and discharged through the openings in the medial zone, said impeller comprising a rotatably mounted support, a series of arms carried by said support, and a plurality of blades attached to peller including a rotary shaft, horizontal arms carried by the shaft, and blades fixed to the arms and projecting axially in a direction to one side of said horizontal arms, the blades being shaped to draw air into the casing through the openings in the polar zones, and to discharge the same through the openings in the medial zones of the casing, the impeller being unbladed at the opposite side of said arms.

'4. In a device of the class described, a

rotary shaft, and an impeller on said shaft, comprising blades having portions adapted to force air axially from one end of the impeller toward the opposite end of the same, the portions of the blades at the last mentioned end being shaped to mix the air from the opposite ends of the impeller and to force the air away from said shaft, said impeller includin horizontal arms carried by the shaft, the lades being attached to said arms and all extending in a direction to one side of said arms, the impeller being unbladed at the opposite side of said arms.

In testimony whereof I aifix my signature.

SOGRATES XIPPAS.

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